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Liebe Kolleginnen und Kollegen,
soeben erreichte uns nachfolgende Warnung des Microsoft Product Security
Notification Service. Wir geben diese Informationen unveraendert an Sie
weiter.
CVE-2009-2526 – Denial of Service Schwachstelle in der SMBv2
Unterstuetzung
Eine Schwachstelle in der Unterstuetzung fuer das SMB2-Protokoll in
Microsoft Windows kann zu einem Absturz des Systems fuehren. Grund
hierfuer ist ein Fehler beim Ueberpruefen von Feldern im SMBv2
Header. Ein Angreifer kann diese Schwachstelle ausnutzen um einen
Denial of Service Angriff auf ein betroffenes System zu starten.
Von dieser Schwachstelle sind nur Systeme betroffen, bei denen die
Unterstuetzung fuer SMB-Dateifreigaben aktiviert ist.
CVE-2009-2532 / CVE-2009-3103 – Schwachstellen in der Unterstuetzung des
SMB Protokolls in Micrososft Windows
Die in Microsoft Windows enthaltene Unterstuetzung des SMB-Protokolls
enthaelt mehrere Schwachstellen bei der Verarbeitung von
Network-Message- und SMB-Paketen. Gelingt es einem entfernten
Angreifer diese Schwachstellen auszunutzen, so kann er beliebige
Befehle mit Administratorrechten auf dem System ausfuehren.
Bitte beachten sie, dass bereits mehrere Exploits fuer diese
Schwachstellen vorhanden sind.
Betroffen sind die folgenden Software Pakete und Plattformen:
Microsoft Windows 2000 Service Pack 4
Windows XP Service Pack 2 und Windows XP Service Pack 3
Windows XP Professional x64 Edition Service Pack 2
Windows Server 2003 Service Pack 2
Windows Server 2003 x64 Edition Service Pack 2
Windows Server 2003 mit Service Pack 2 fuer Itanium-Systeme
Windows 7 fuer 32-Bit System
Windows 7 fuer x64-basierte Systeme
Windows Server 2008 R2 fuer x64-basierte Systeme
Windows Server 2008 R2 fuer Itanium-basierte Systeme
Vom Hersteller werden ueberarbeitete Pakete zur Verfuegung gestellt.
Hersteller Advisory:
http://www.microsoft.com/technet/security/bulletin/ms09-050.mspx
(c) der deutschen Zusammenfassung bei DFN-CERT Services GmbH; die
Verbreitung, auch auszugsweise, ist nur unter Hinweis auf den Urheber,
DFN-CERT Services GmbH, und nur zu nicht kommerziellen Zwecken
gestattet.
Mit freundlichen Gruessen,
Michael Groening, DFN-CERT
– —
Michael Groening (Incident Response Team)
DFN-CERT Services GmbH, https://www.dfn-cert.de, Phone +49 40 808077-555
Sitz / Register: Hamburg, AG Hamburg, HRB 88805, Ust-IdNr.: DE 232129737
Sachsenstrasse 5, 20097 Hamburg/Germany, CEO: Dr. Klaus-Peter Kossakowski
Automatische Warnmeldungen https://www.cert.dfn.de/autowarn
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AUSCERT External Security Bulletin Redistribution
ESB-2009.1399
Vulnerabilities in SMBv2 Could Allow Remote Code Execution
14 October 2009
===========================================================================
AusCERT Security Bulletin Summary
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Product: SMBv2
Publisher: Microsoft
Operating System: Windows Vista
Windows Server 2008
Impact/Access: Execute Arbitrary Code/Commands — Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2009-2526
Original Bulletin:
http://www.microsoft.com/technet/security/bulletin/ms09-050.mspx
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Microsoft Security Bulletin MS09-050 – Critical
Vulnerabilities in SMBv2 Could Allow Remote Code Execution (975517)
Published: October 13, 2009
Version: 1.0
General Information
Executive Summary
This security update resolves one publicly disclosed and two privately
reported vulnerabilities in Server Message Block Version 2 (SMBv2). The most
severe of the vulnerabilities could allow remote code execution if an
attacker sent a specially crafted SMB packet to a computer running the Server
service. Firewall best practices and standard default firewall configurations
can help protect networks from attacks that originate from outside the
enterprise perimeter. Best practices recommend that systems that are
connected to the Internet have a minimal number of ports exposed.
This security update is rated Critical for supported editions of Windows
Vista and Windows Server 2008. For more information, see the subsection,
Affected and Non-Affected Software, in this section.
The security update addresses the vulnerabilities by correctly validating the
fields inside the SMBv2 packets, correcting the way that SMB handles the
command value in SMB packets, and correcting the way that SMB parses
specially crafted SMB packets. For more information about the
vulnerabilities, see the Frequently Asked Questions (FAQ) subsection for the
specific vulnerability entry under the next section, Vulnerability
Information.
This security update also addresses the vulnerability first described in
Microsoft Security Advisory 975497.
Recommendation. The majority of customers have automatic updating enabled and
will not need to take any action because this security update will be
downloaded and installed automatically. Customers who have not enabled
automatic updating need to check for updates and install this update manually.
For information about specific configuration options in automatic updating,
see Microsoft Knowledge Base Article 294871.
For administrators and enterprise installations, or end users who want to
install this security update manually, Microsoft recommends that customers
apply the update immediately using update management software, or by checking
for updates using the Microsoft Update service.
See also the section, Detection and Deployment Tools and Guidance, later in
this bulletin.
Known Issues. None
Affected Software
Windows Vista, Windows Vista Service Pack 1, and Windows Vista Service
Pack 2
Windows Vista x64 Edition, Windows Vista x64 Edition Service Pack 1, and
Windows Vista x64 Edition Service Pack 2
Windows Server 2008 for 32-bit Systems and Windows Server 2008 for 32-bit
Systems Service Pack 2 (Windows Server 2008 Server Core installation
affected)
Windows Server 2008 for x64-based Systems and Windows Server 2008 for
x64-based Systems Service Pack 2 (Windows Server 2008 Server Core
installation affected)
Windows Server 2008 for Itanium-based Systems and Windows Server 2008 for
Itanium-based Systems Service Pack 2
Vulnerability Information
SMBv2 Infinite Loop Vulnerability – CVE-2009-2526
A denial of service vulnerability exists in the way that Microsoft Server
Message Block (SMB) Protocol software handles specially crafted SMB version 2
(SMBv2) packets. An attempt to exploit the vulnerability would not require
authentication, allowing an attacker to exploit the vulnerability by sending a
specially crafted network message to a computer running the Server service. An
attacker who successfully exploited this vulnerability could cause the computer
to stop responding until restarted.
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You have received this e-mail bulletin as a result of your organisation’s
registration with AusCERT. The mailing list you are subscribed to is
maintained within your organisation, so if you do not wish to continue
receiving these bulletins you should contact your local IT manager. If
you do not know who that is, please send an email to auscert@auscert.org.au
and we will forward your request to the appropriate person.
NOTE: Third Party Rights
This security bulletin is provided as a service to AusCERT’s members. As
AusCERT did not write the document quoted above, AusCERT has had no control
over its content. The decision to follow or act on information or advice
contained in this security bulletin is the responsibility of each user or
organisation, and should be considered in accordance with your organisation’s
site policies and procedures. AusCERT takes no responsibility for consequences
which may arise from following or acting on information or advice contained in
this security bulletin.
NOTE: This is only the original release of the security bulletin. It may
not be updated when updates to the original are made. If downloading at
a later date, it is recommended that the bulletin is retrieved directly
from the author’s website to ensure that the information is still current.
Contact information for the authors of the original document is included
in the Security Bulletin above. If you have any questions or need further
information, please contact them directly.
Previous advisories and external security bulletins can be retrieved from:
http://www.auscert.org.au/render.html?cid=1980
If you believe that your computer system has been compromised or attacked in
any way, we encourage you to let us know by completing the secure National IT
Incident Reporting Form at:
http://www.auscert.org.au/render.html?it=3192
===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072
Internet Email: auscert@auscert.org.au
Facsimile: (07) 3365 7031
Telephone: (07) 3365 4417 (International: +61 7 3365 4417)
AusCERT personnel answer during Queensland business hours
which are GMT+10:00 (AEST).
On call after hours for member emergencies only.
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